Circuit tester



.ug A. M. ROBERTS CIRCUIT TESTER Filed Sept. 23, 1925 Aom/m-M. Hobs/f5,3mm

W/fnes-ses' Patented Aug. 7, 19 8- v UNITED STATES PATENT OFFICE.

A.BBAHAM I. ROBERTS, OI OBGOOD, INDIANA.

- cmcurr TESTER.

I Appllcatlon filed September 28, 1925. Serial No- 58,155.

vide an, electrical testing device of the aboveprovided for fac1l1-'kind wherein means is tating the use of an ordinary portable electriclamp whereby the incandescent bulb of the latter will act as anindicator and will be supplied. with current for its illumination bymeans of the usual battery cells of such lamp.

Other objects will appear as the nature of. the invention is betterunderstood, and the" same consists of the novel form, combination andarrangement of parts hereinafter more fully described, shown in theaccompanying drawing and claimed.

In the drawing, wherein like reference characters indicate correspondingparts throughout the several views, 5 v

Figure 1 is an elevational view partly broken away, showing a testingdevice constructed in accordance with the present invention. I

Figure 2 is an enlarged fragmentary elevational view showing the handand contact fingers of the device illustrated in Figure 1 and Figure 3is an enlarged perspective view of one of the connectors for associatingthe conductors of the contact fingers with the ous electricaltranslating devices may be portable electric lamp.

Referring more in detail to the drawing, the present invention embodiesan elongated handle 5 of insulating material to one end of which ispivoted a pair of contact fingers 6 which are foldable to positionsbeside the handle when not in use as indicated by dotted line in Figure1, whereby the device may be caused to occupy a com aratively smallspace. The pivots of the ngers are indicated at 7 and are transverselyalined.

Extending longitudinally of and axially through the handle 5 is anattachment cord 8 composed of a pair of conductors 9, one of which hasan end connected to the pivot 7 of one of the fingers 6 and the other ofwhich has an end connected to the pivot 7 of the other finger 6. Theremaining ends of the conductors 9, are provided with connectors simgileand durable in that when t for electrical connection of the same withconductors of a conventional portable electr c lamp generally indicatedat 10, and each of the latter connectors consist of a pin 11 attached tothe end of the conductor 9 and.

having one end thereof extending inwardly through an end' of a circularclasp 12 adaptfed to snugly embrace the casing of the lamp 10.Conventional lamps of the type shown at 10 embody conductors 13 and 14in electrlcal connection with an electric light bulb carried within areflector usually provided at 1 5, and; with a terminal of battery cellsearned within the casing 10, respectively. The conductors 13 and 14 ofthe lamp 10 are usually bridged by mani ulation of a switch 16, but inaccordance wit the present invention the casing 10 is formed withopenings through which the pins 11 may project to engage the conductors13 and 14 so that the circuit of the incandescent bulb of the lamp 10will be closed when the contact fingers 6 are bridged by a conductingmeans. The pinsll are maintained in the o enings of the casing of thelamp '10 and 1n engagement with the conductors 13 and 14 by means of theclasp 12, and it will thus be seen e fingers 6 are bridged,-the electriclight bulb in the reflector 15 will be lighted by current from thebattery cells within the casing of the lamp. l0. Thus, if the fingers 6are engaged with the terminals of a fuse plug, the bulb. of the lamp 10will be lighted providedthe fuse is good, while the bulb w1ll not belighted if the fuse'is burned out or there is a break between theterminals thereof. It is obvious that varitested by engaging thetermials thereof with the contact fingers 6, the bulb of the lamp 10being lighted when the current of the battery cells of the lamp 10properly flows through such electrical translating devices, and suchbulb remaining unlighted when a break is encountered. In this wayvarious electrical testing operations may be' conveniently carried out.

A testing device constructed in accordance with the above is extremelysimple and cheap in construction as well as eflicient in operation andenables the employment of a conventional portable lamp to provide thenecessary indicator and source of electricity. Ovbiously when the deviceis not in use the clasp 12, ma be disengaged from the lamp 10 so that te latter may be carried separately from the remaining parts forconvenience.

It-is of course to be understood that the presentdevice is designedparticularly for use u on flash lights of the type employing fibreeandles.

From the foregoing description it is be-- lieved that the constructionand operation as well as the advantages of the present invention will bereadily understood and appreciatedb those skilled in the art.

What I c aim as new is:

1. A circuit tester of the character de-.

and said other conductor element, a pair of resilient band membersdesigned to be engaged about said casing, a contact post carried by saidbands and each adapted to have one end extended through an adjacentcasing aperture for engagement with a conductor element, and flexibleconducting elements each leading from one of said contact postssubstantially as and for the purpose described. I

' 2.]A circuit tester of the character described, comprisin a hand flashlight including a casing esigned to receive a dry.

cell, and having a air of apertures formed therethrough, con uctorelements within said casing each one thereof arranged adjacent one ofsaid apertures and one of said elements having an electrical en agementwith said cell, an incandescent amp arranged between the other pole ofsaid cell and said other conductor element, a pair of resilient bandmembers designed to be engaged about said casing, a contact post carriedby said bands and each adapted to have one end extended through anadjacent casing aperture for engagement with a conductor element,flexible conducting elements each leading from one of said contactposts,

said resilient elements being removably carried by said casing to permitthe use of said flash light independently of the bands, posts andflexible conducting element.

In testimony whereof I aflix my signature.

ABRAHAM M. ROBERTS.

